Exhibit
21.1
As of December 31, 2005
Quest Diagnostics Incorporated
(DE)
(Incorporated on December 12, 1990 in
Delaware; FEIN No. 16-1387862)
Subsidiaries and Joint Ventures
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| 100% |
Quest Diagnostics Holdings Incorporated (f/k/a SBCL, Inc.) (DE) |
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|
100% |
Quest Diagnostics Clinical Laboratories, Inc. (f/k/a SmithKline Beecham Clinical Laboratories, Inc.) (DE) |
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(33-l/3%) |
Compunet Clinical Laboratories (OH) |
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(44%) |
Mid America Clinical Laboratories (IN) |
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(51%) |
Diagnostic Laboratory of Oklahoma LLC (OK) |
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|||||
| 100% |
Quest Diagnostics Incorporated (CA) |
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|||||
| 100% |
Quest Diagnostics Incorporated (MD) |
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|
100% |
Diagnostic Reference Services Inc. (MD) |
||||
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|
100% |
Pathology Building Partnership (MD) (gen. ptnrshp.) |
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| 100% |
Quest Diagnostics Incorporated (MI) |
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| 100% |
Quest Diagnostics Investments Incorporated (DE) |
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100% |
Quest Diagnostics Finance Incorporated (DE) |
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| 100% |
Quest Diagnostics LLC (IL) |
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| 100% |
Quest Diagnostics LLC (MA) |
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| 100% |
Quest Diagnostics LLC (CT) |
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| 100% |
Unilab Corporation (DE) |
|||||
|
|
100% |
Unilab Acquisition Corporation, d/b/a FNA Clinics of America (DE) |
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| 100% |
Quest Diagnostics of Pennsylvania Inc. (DE) |
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51% |
Quest Diagnostics Venture LLC (PA) |
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53.5% |
Associated Clinical Laboratories (PA) (gen. ptnrshp.) |
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100% |
North Coast General Services, Inc. (PA) |
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| 100% |
Quest Diagnostics of Puerto Rico, Inc |
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| 100% |
Quest Diagnostics Receivables Inc. (DE) |
|||||
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| 100% |
Quest Diagnostics Ventures LLC (DE) |
|||||
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| 100% |
DPD Holdings, Inc. (DE) |
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|
100% |
MetWest Inc. (DE) |
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100% |
Diagnostic Path Lab, Inc. (TX) |
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100% |
Quest Diagnostics Provider Network, LLC (CO) |
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|
49% |
Sonora Quest Laboratories LLC (AZ) |
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| 100% |
American Medical Laboratories, Incorporated (DE) |
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|
100% |
AML Inc. (DE) |
||||
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|
100% |
Quest Diagnostics Nichols Institute, Inc. (f/k/a Medical Laboratories Corporation) (VA) |
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|
100% |
Quest Diagnostics Incorporated (NV) |
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100% APL Properties Limited Liability Company (NV) |
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| 100% |
Lab Portal, Inc. (DE) |
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| 100% |
LabOne, Inc. (MO) |
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100% |
ExamOne World Wide, Inc. (PA) |
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100% |
ExamOne World Wide of NJ, Inc. (NJ) |
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100% |
Systematic Business Services, Inc. (MO) |
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100% |
Scan Tech Solutions, LLC (MO) |
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100% |
LabOne, L.L.C. (KS) |
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100% |
Central Plains Holdings, Inc. (KS) |
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100% |
Central Plains Laboratories, LLC (KS) |
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100% |
LabOne Canada, Inc. (Ontario) |
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100% |
ExamOne Canada, Inc. (Ontario) |
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100% Rapid-Med Plus Franchise Corporation (Ontario) |
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100% |
LabOne of Ohio, Inc. (DE) |
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100% |
Osborn Group, Inc. (DE) |
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100% |
Intellisys, Inc. (GA) |
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100% |
Lifepoint Medical Corporation (DE) |
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100% |
C&S Clinical Laboratory, Inc. (d/b/a Clinical Diagnostic Services) (NJ) |
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100% |
MedPlus, Inc. (OH) |
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100% |
Worktiviti, Inc. (f/k/a Universal Document Management Systems, Inc.) (OH) |
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100% |
Valcor Associates Inc. (PA) |
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100% |
Nichols Institute Diagnostics (CA) |
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100% |
Nichols Institute Diagnostics Limited (UK) |
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100% |
Nichols Institute Diagnostics Trading AG (Switzerland) |
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100% |
Nichols Institute Diagnostika GmbH (Germany) |
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100% |
Nichols Institute Diagnostika GmbH (Austria) |
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100% |
Nichols Institute International Holding B.V. (Netherlands) |
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100% |
Nichols Institute Diagnostics B.V. (Netherlands) |
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100% |
Nichols Institute Diagnostics SARL (France) |
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100% |
Nomad Massachusetts, Inc. (MA) |
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|
100% |
Quest Diagnostics, S.A. de C.V. (Mexico) |
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100% |
Analisis, S.A. (Mexico) |
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|
100% |
Laboratorios Clinicos de Mexico, S.A. de C.V. (Mexico) |
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100% |
Servicios de Laboratorio, S.A. de C.V. (Mexico) |
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100% |
Laboratorios de Frontera Polanco, S.A. de C.V. (Mexico) |
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100% |
Laboratorio de Analisis Biomedicos, S.A. (Mexico) |
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100% |
Quest Diagnostics do Brasil Ltda. (Brazil) |
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|
100% |
Quest Diagnostics Limited (UK) |
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|
100% |
The Pathology Partnership plc (UK) |
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2